The 3M Electrical Spring Connector 412 will electrically connect copper conductors in a pigtail application. This Hex-Head Connector is capable of a 1 conductor termination or a 2 or more conductor connection in a pigtail application. What makes the 412 different from other tan connectors with hexagon shaped heads? A wider spring opening enables easier and faster insertion of larger wire combinations than with other tan connectors. The 412 is UL listed for up to four 12 awg solid and stranded wires. The 412 molded insulator resists warping and expansion when pushed to the upper limits of its wire ranges.